Now i recommend that you choose first option to install the files using the Mods folder, this will make easier disable the modded files case you want play online later (removing asi loader):

If everything goes well you should see this screen, click in Close:

Now close OpenIV and open it again, click in the Windows button in GTA V option.
In the menu "Tools" click in "ASI Manager", make sure you have at least "ASI Loader" and "OpenIV.asi" installed:

Now let's install the flag that need to be installed manually, in the openiv window find the file x64w.rpf in the left side of the program, right click it and click in "Copy to "mods" folder".

After the copy you will see in the main window the folder "dlcpacks", double click it to open and then navigate to: mpindependence\dlc.rpf\x64\levels\gta5\props\dlc_lev_des.rpf

Now click in "Edit Mode" and answer "Yes" to the message box that will appear, now click in the green cross to add a file and then select the file "ind_prop_dlc_flag_01.yft" that should be in same folder of the Package file that we used before:

Click in "Open" and it's done:

Testing the script in game

Now that we have the Script and the modded files installed (also ScripthookV and ScripthookVDotNet) we can proceed and test the script in game, so, with game loaded and your character on screen, press Ctrl + N to show the mods menu, select "Los Santos Pride" and press "Enter", the mod menu should appear with options to start the parades in 3 different places and some other options for customization/interaction:

Case you can't see the menu, check the troubleshooting post clicking here.

You can use any mp3 sound to be played when the parade starts, just place the mp3 file with the name music.mp3 in the "Scripts\Pride Parade files" folder.

-This mod creates a parade in 3 different locations that you can choose in the menu
-Custom music can be added to folder "Pride Parade files" with name music.mp3
-This mod includes some custom clothes and skin mods to bring more life and style to the parade
-Planes will fly over the parade releasing colored smokes
-Blimp with custom texture will fly over the parade
-Some peds will have custom clothes related to the Pride Parade